Senior Frontend Developer

Location: Toronto, ON (Hybrid, 3 days on-site and 2 days remote)

Duration: 6 month contract with potential 6 month extension

Background Check Requirement: Successful completion of criminal check

Language: Excellent written and verbal English communication skills required

About the Opportunity

We are seeking a Senior Front-End Developer to join a large-scale public sector technology initiative focused on transforming how users access and manage critical services through a centralized digital platform.

In this role, you will collaborate with multidisciplinary teams including developers, analysts, stakeholders, and business partners to design and deliver innovative solutions that improve user experiences and streamline complex processes. This is an opportunity to contribute to high-visibility projects while helping shape scalable, secure, and accessible applications used by a broad community of users.

What’s In It for You

• Opportunity to contribute to a large-scale digital transformation initiative with meaningful public impact

• Exposure to complex enterprise applications, modern front-end technologies, and secure authentication frameworks

• Collaborative team environment that values innovation, knowledge sharing, and continuous improvement

• Opportunity to influence technical design decisions and contribute to solution architecture

• Flexible hybrid work environment that supports work-life balance and productivity

Your Responsibilities

• You’ll design, develop, test, and implement front-end software components for a centralized digital platform and its integrated modules

• You’ll build and enhance Single Page Applications using modern JavaScript frameworks and RESTful API integrations

• You’ll document technical specifications, architecture designs, integration requirements, and development processes

• You’ll troubleshoot application issues, perform root cause analysis, and recommend effective solutions to maintain system reliability

• You’ll collaborate with cross-functional teams to ensure seamless integration of application components and consistent delivery standards

• You’ll support accessibility, privacy, and security requirements while ensuring compliance with established standards and best practices

• You’ll participate in project planning, estimation, testing, and deployment activities to support evolving business needs

Skills and Qualifications

• 10+ years of experience developing Single Page Applications using HTML5, CSS3, JavaScript, jQuery, Bootstrap, React, Backbone.js, Stencil.js, and REST API integrations using JSON and XML

• 10+ years of experience developing accessible digital products compliant with WCAG 2.x AA, AODA, and WAI-ARIA standards across web and mobile platforms

• 10+ years of experience implementing secure authentication solutions using OpenID Connect (OIDC), PKCE, and authorization code flows within Single Page Applications

• Experience developing, maintaining, and supporting large-scale enterprise applications within complex environments

• Strong understanding of application architecture, technical documentation, risk assessment, QA/UAT processes, and integration methodologies

• Proven ability to troubleshoot production issues, conduct root cause analysis, and support continuous improvement initiatives

• Post-secondary education in Computer Science or a related field, or an equivalent combination of education and experience, combined with strong communication and stakeholder engagement skills

Why Partner with Altis

If you’ve never worked with a staffing agency before, we make it easy. We work with top employers across Canada who have great jobs to fill, each vetted and verified by our team. When you apply for a job with Altis, we get to know you as a candidate and learn what your strengths are. Then, if you’re a solid match, we handle all the logistics, advocating for you as a candidate for the role, providing access to coaching and connecting you directly with the hiring manager. And rest assured, all our services are free of cost for candidates.